How to use git subtree From http://stackoverflow.com/questions/920165/howto-extract-a-git-subdirectory-and-make-a-submodule-out-of-it

Git Subtree

# Go into the project root
cd ~/my-project

# Create a branch which only contains commits for the children of 'foo'
git subtree split --prefix=foo --branch=foo-only

# Remove 'foo' from the project
git rm -rf ./foo

# Create a git repo for 'foo' (assuming we already created it on github)
mkdir foo
pushd foo
git init
git remote add origin git@github.com:my-user/new-project.git
git pull ../ foo-only
git push origin -u master
popd

# Add 'foo' as a git submodule to `my-project`
git submodule add git@github.com:my-user/new-project.git foo